on my arch-based systems, i use repos first, aur second. appimages third. i do also have a couple minor things (that are self-contained with no dependencies) that were just ‘unzipped’ into their own directories and links added to menus where appropriate. note that i don’t game on these systems. i don’t have a lot of aur packages installed, so updates and subsequent recompile time isn’t an issue.
i have yet to run into anything i want or need that isn’t available in those. so no flatpaks or snaps.
i’ve seen two of these things around here. they’ve both been on the flatbed of a local towing service.